Lifting-jack.



E. ERICKSON L P. SJOSTROIV.

LIFTING JACK.

APPLICATION FILED FEB. 4. Isis.

Patented Dec. 5,

@Mv/w@ EDWARD ERICKSON, F CLIFTONDALE, ANDPETER SJ'OSTROM, OF MAPLEWOOD, MASSACHUSETTS.

LllFTNG-JACK.

momia.

Specification of Letters Patent.

Patented Dec. 5., 1916.

Application led February 4l, 1916. Serial No. 76,486.

motor cars, and it has for its object the provision 'of a jack so constructed that the lifting operation maybe controlled at the end of a lateral arm, thus making it unnecessary for the operator to exert himself by manipulating an oscillating controlling lever as in most of the jacks now in general use.

The invention consists in a standard having a chambered base in which is mounted mechanism for rotating a screw extending through a nut secured t o the lower end of a vertically reciprocating lifting member, said -rotating mechanism being operated by a rotatable varm extending laterally from said 1 base and inclined upwardly therefrom:

The inventionfurther consists 1n means for locking the operating arm to the driving mechanism and in means whereby the oper- 'ating arm may be folded when not 1n use v and rigidly locked when extended.v

` The invention consists further inmeans wherebya handle may be confined within the operating arm under normal conditions and moved into a position transversely thereof when it is desired to rotate said operating arm thereby.'

The. invention further consists in certain l novel features of construction and arrangeof the present invention. Fig. 2 represents 'a vertical section of the body portion of the jack anda part'of the rotatable operating member, said Afigure being drawn to an enlarged scale. Fig. 3 represents a` horizontal Asection of the same, the cutting plane being on I ineB-Son Fig. 1. Fig. It represents a section of the. lower end of the rotatable reciprocates within the chamber 12.

operating member. Fig. 5 represents an eleva-tion of the same. Fig. 6 represents a longitudinal section of the hinge connection between the two parts of the rotatable operating member. Fig. 7 represents a section of the same, the cutting plane being on line 7 -7 on Fig. 6. Fig. 8 represents an elevatlon of the same. Fig. 9 represents a longitudinal section similar to Fig. 6, showing the two parts of the rotatable operating member folded on each other. Fig. 10 represents a longitudinal section of the outer end of the rotatable member. Fig. 11 represents a similar view to. be hereinafter described. Fig. 12 represents a similar view showing a portion of the handle in its operating position, and Fig. 13 represents a section of the same on line 13--13 on Fig. 12.

Similar characters designate like parts throughout the several figures of the drawings.

In the drawings, 10 is a base having a standard 11 projecting upwardly therefrom, this standard being provided with a vertical chamber 12 extending longitudinally thereof. lin the chamber 12 is positioned a tubular member 13 adapted to be reciprocated therein. To the upper end of the tubular member 13 is secured a support 14, said sup-- port having a shank extending into said tubular member 13 and fastened therein by means of the transverse pin 15. Preferably the standard 11 and the tubular member 13 are made rectangular in cross section, as in dicated in Fig. 3 of the drawings. By means of this construction the tubular member 13 is prevented from turning about its axis as it 1nserted into the llower end of the tubular member 13 is a nut 16 through which .ex-

tends the screw member 17 having ,threads coacting with the threads of said nut 16. To`the' lower end of the screw 17' is secured a bevelgear 18, the teeth of which mesh with a pinion 19. The gear 18 and pinion 19 are positioned within a chamber 20 within the base 10.

A plate 21 is secured to the lower end of the base 10 by means of the members 22 and nuts 23, said plate 21 closing the open end of said base 10, as indicated in Fig. 2 of the drawings. The base plate 21 has a conical seat 24 therein in which is positioned the conical end 25 of a threaded member 26 extending from the lower end of theV screw 17 and threaded thereto in 4axial alinemen'ft therewith. By adjusting lthe member 26 relatively to the screw 17 the gear 18 may.

The hub of the pinion 19 is provided with an annular groove 28 with which engages the pin-29 mounted in the casing 11 and extending transversely thereof. This pin 29 preventsV longitudinal movement of the pin ion 19. The base 10 has extending therefrom a cylindrical boss 30 in which is mounted a cylindrical bushing 3.1. The hub 32 of the pinion 19 extends into said bushing 31 and is provided with 'a reduced shank 33 between the wall of which and the inner wall of the bushing 31 yis adapted to be inserted the lower end of thetubular operating member 34.

The shank 33 is provided with the outwardly extending lug 35 adapted to be positioned in a slot 36 in the end of the member 34 when its lower endhas been positioned within the bushing 31. rlhe shank 33 has a vas transverse opening-37 therein in which is located a spring 38 pressing a ball 39 lvoutwardly. This ball 39 is adapted to enter a depression or recess 40 in thelower end of the member 34' when said end has been positioned withinvthe bushing 31, thus locking said member to the pinion 19 and preventing its accidental displacement there from. The cylindrical boss 30 is preferably inclined upwardly as indicated in Figs. 1 and 2 of the drawings. y

The outer endof the member 34 has secured thereto a block 41 having a projecting ear 42 extending laterally therefrom which ear is pivotally connected by means of the pin 43 with the lears 44 struck from the lower end of the tubular member 45. Adjacent to the pivot pin 43 is yan opening 46 extending,

transversely of the block 41. In this opening 46'are two balls 47 pressed outwardly from each other by means of a spring 48. The ears 44 are provided with recesses or depressions 49 therein with which the balls`47 are adapted to-coactto lock the members 34 and 45 in alinement.

When it is desired to fold the section 45 upon the section 34, as shown in Fig. 9, the part 45 is moved about the axis of the pivot y43; the balls 47 being moved inwardly against the tension of the spring 46 in so doing. While in this position the ears 44 prevent the accidental displacement of the balls 47. As soon, however, as the part 45 is returned into position in alinement with the part 34, the recesses 49 will be moved into a position opposite to the balls 47 and the vWhile in alinement the parts 34-45 will be turned about their axes and rotate the pinion 19 thereby effecting the rotatiorn of the screw 17, and thus causing the nut 16 with the tubular member 13 connected thenevwith to be raised or lowered within tlie chamber 12. The rotation of the members 34-45 is effected by means-of the handle 50. The handle 50 extends through a transverse openingy in the revoluble member 51 mounted in the bifurcated member 52 secured to the outer end' of the member 45. This handle 50 is provided with a head 53 at each end thereof and midway between said heads it has an annular groove 54. When the` jack is not in operation the handle 50 is pushed through the opening'in the revoluble member 51 and untll one of its heads bears against said revoluble member, the larger part of said handle being at this time positioned within the tubular member 45, as indicated in Fig. 10 of the draw-I When it is desired to opera-te the jack the handle 5 0 is-pulled through the opening in the revoluble member 51 until the opposite head thereof is in contact with the revoluble member 51 and`then said revoluble member is turned about its axis until the handle 50y is at right angles to the axis of the rotatable operating members 34-45, and then said handle is moved relatively toithe revoluble member 51 until the groove 54 therein is positioned midway of the length of said revoluble member 51, as shown in Figs. 12 and 13 of the drawings. When 'thus positioned the handle 50 will be locked from ac- .use of the jack has been completed the handle 50 is returned into its normal position within the tubular member'45 and the member 34 is disconnected from the operating pinion 19 and the two parts of the operatin handle are folded into contact with each otherabout the pivot 43. When the parts are thus disconnected and folded, they occupy very little space in the tool box of the car.

By having the operating parts of the screw in the chambered base, greater rigidity is given to the jack when in use. It is also true that by vmaking the tubular member 13 movable lengthwise and the screw 17 movable only about its axis, the lifting member is provided with a substantial bearin sur.-

ycidental movement byy means of the spring iat face at all times when in operation. wing till position.

aeeaaia i to the inclination of the boss 30 'and the inclination of the rotatable operating arm 34- 45, the jack may be easily operated wlthout any necessity of the operator crawling beneath the motor vehicle. By means of the use of the screw 17 coacting with the nut 16 a of the lifting member 13-147 great leverage may be attained by the simple rotation of the operati arm SLi-45.

- It is believed that the operation and many advantages of this invention will be fully understood from the foregoing description.

Having thus described our invention, we claim:

1. In a device of the class described, the combination of a standard; a reciprocating tubular member therein; a nut in the lower end thereof; a screw threaded member extending through said nut; a bevel gear secured to the lower end of said threaded member; a bevel pinion meshing therewith; means for rotating said pinion; a basev plate secured to the bottom of said standard provided with a conical seat in axial alinement with said threaded member; and a stud adjustably mounted in the endl of said threaded member and having a conical end positioned in said seat.`

2. In a'device of the class described, the combination of a standard; a reciprocating tubular member therein; a nut in the lower end thereof; a screw threaded member extending through said nut; a bevel gear secured to the lower end -of said threaded member; a bevel pinion meshing therewith; means for rotating said pinion ;a base plate secured to the bottom of said standard provided with a conical seat in axial alinement with said threaded member; a stud screwed into the end of said threaded member and having a conical end positioned in said seat; and means for locking said stud in adjusted 3. In a device of the classd'escribed, the combination of a standard having a chambered base and a cylindrical boss extending from said base; lifting mechanism in said base and standard including a revoluble member having a hub mounted'in said cylindrical boss and provided with a reduced shank extending outwardly-* therefrom; a lateral projection from said shank; a spring pressed locking member` in said shank adapted to extend beyond the periphery thereof; and a rotatable tubular menifber provided at one end with a slot to receivesaid projection and a recess to receive said locking member when said end has been positioned between the periphery of said shank and the wall of said bossi:

Ll. In a device of the class described,'the combination of a standard having a chambered base and a cylindrical boss extending from said base; lifting mechanism in said base and standard including a revoluble member having a hub mounted in said cylindrical boss and provided with a reduced shank extending outwardly therefrom; a rotatable member having a cylindrical portion adapted to be positioned between said shank and the inner wall of said boss; and means for locking said rotatable member tosaid shank.

5.`In a device of the class described, Vthe combination of a standard having a chambered base and a cylindrical boss extending from said base; a reciprocating tubular mem-berin said standard La nut in the lower end of said tubular member; a threaded member extending through said nut; a bevel gear secured to the lower end of said threaded member; a bevel pinion meshing with said gear and provided with. a hub mounted in said cylindrical boss; a rotatable member having one end adapted for insertion in the outer end of said boss; and means within said boss for locking said inserted end to the hub of said pinion.

6. In a device of the class described, the combination of a standard having a cylindrical boss extending laterally therefrom; a reciprocating member in said standard; mechanism for reciprocating said member including a revoluble member in said boss; a rotatable member having one end adapted for insertion in said boss; and means within said boss for locking said inserted end to1 said revoluble member.

7. In a device of the class described, the combination of a standard having a cylindrical boss extending laterally therefrom; a reciprocating member in said standard; mechanism for reciprocating said member including a revoluble member in said boss; a rotatable member having one end adapted for insertion in said boss; means for locking said inserted end to said revoluble member; a bifurcated member at the outer end of said rotatable member; a cylindrical mem ber revolubly mounted in said bifurcated. member and having a hole extending transversely therethrough; and a headed handle a rotatable member having one end adapted for insertion in said boss; means for locking said inserted end to said revoluble member; a bifurcated member at the outer end of said rotatable member; a cylindrical member revolubly mounted in said bifurcated member and having a hole extending transversely therethrough; a headed hanalle positioned in said hole and adapted to be moved endwise thereimsiid hand e having an anspring-pressedlocking device in said cylin- I dricall member adapted to coact with the .groove ,in lsaid `handle -when in operative position.`

9. In a device of the class described, the

combinationof va standard having a cylindrical boss extending laterally therefrom; llifting mechanism within said standard including a revoluble member in said boss; a tubular rotating member `having one end adapted for insertion into said boss and to be-locked to said revoluble member; a'block secured to the opposite end and provided withy alateral projection; another tubular rotating member having ears adapted to inclose said projection; a pivot pin extending through said ears and projection; and means for locking said tubular members in alinement.

10. ln a device of the class described, the combination of a standard having a cylindrical boss`extending laterally therefrom; mechanism Within said standard including a revoluble member `in said boss.; a tubular rotating member having one end adapted for insertion into said boss and to be locked to said revoluble member; a block secured to the opposite end and provided with a lateral projection and a transverse opening therethrough; two balls in said opening; a spring momie between said balls forcing them outwardly; another tubular rotating member having ears adapted to inclose said projection; a pivot pin extending through said ears and projection; and recesses in said ears adapted to coact with said balls to lock said tubular members in alinement.

11. In a device of the class described, the combination of a standard having a cylindrical boss extending laterally therefrom; mechanism Within said standard includinor a revoluble member in said boss; a tubular rotating member having one end adapted for insertion into said boss and to be locked to said revoluble member; a block secured to the opposite end and provided with a lateral projection; another tubular rotating member having ears adapted to inclose said projection; means for locking said tubular members in alinement; and a handle normally contained within said outer tubular rotating member but adapted to be withdrawn therefrom and disposed transversely thereof. g

Signed by us at 4 Post Oiiice Sq., Boston, Mass., this 29th day of January, 1916.

EDWARD ERICKSON. PETER SJOSTROM. Witnesses:

WALTER E. LOMBARD, NATHAN C. LOMBARD.

Copies of this p'atent may be obtained for ve cents each, by addressing the Commissioner of Patents.

v Washington, D S. 

